diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 6b89530c3..4ef741c36 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -100,5 +100,5 @@ jobs:
 
     - name: Documentation
       run: |
-        pip install -r doc/requirements.txt
+        pip install ".[doc]"
         make -C doc html
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 0b83e20ea..9bce80fd2 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -32,4 +32,5 @@ python:
   install:
   - method: pip
     path: .
-  - requirements: doc/requirements.txt
+    extra_requirements:
+    - doc
diff --git a/setup.py b/setup.py
index 3f57e3327..143206653 100755
--- a/setup.py
+++ b/setup.py
@@ -17,6 +17,7 @@ def _read_content(path: str) -> str:
 version = _read_content("VERSION").strip()
 requirements = _read_content("requirements.txt").splitlines()
 test_requirements = _read_content("test-requirements.txt").splitlines()
+doc_requirements = _read_content("doc/requirements.txt").splitlines()
 long_description = _read_content("README.md")
 
 
@@ -75,7 +76,10 @@ def _stamp_version(filename: str) -> None:
     package_dir={"git": "git"},
     python_requires=">=3.7",
     install_requires=requirements,
-    extras_require={"test": test_requirements},
+    extras_require={
+        "test": test_requirements,
+        "doc": doc_requirements,
+    },
     zip_safe=False,
     long_description=long_description,
     long_description_content_type="text/markdown",
diff --git a/tox.ini b/tox.ini
index 6e02e5aee..dfcb5ed8f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ ignore_outcome = true
 [testenv:html]
 description = Build HTML documentation
 base_python = py{39,310,311,312,38,37}
-deps = -r doc/requirements.txt
+extras = doc
 allowlist_externals = make
 commands =
     make BUILDDIR={env_tmp_dir}/doc/build -C doc clean